Not exactly a song but here goes....

Daddy, I turned 6 today

Hello, Daddy, I turned six today
We had a party and Jimmy and Tommy were there
We had strawberry cake and chocolate ice cream
Uncle John sang Happy Birthday on his guitar
I got a bicycle and a red fire engine
But the thing I wanted most I did not receive
For when the two towers came tumbling down
You gave all that you had to give

Hello, Daddy, I graduated today
You should have seen us in the robes of black
As we sauntered down the theater aisles
Tassles swinging back and forth with each step
Arm and arm with my partner in life, Mary
I saw your shadow sitting by mom, hand upon her arm
As I looked up to see mom with tears in her eyes
Wishing that you could have been there in flesh
Wishing that hose towers never fell from the skies

Hello, Daddy, I got married today
To red headed Mary my partner for life
Her smile glistened encased in white lace
As the Father stood before us, making her my wife
Mom sat right up there in front of the crowd
Next to an empty chair where you should have been
But I knew you were there with us, watching
Shouting congratulations! upon the summer wind

Hello, Daddy, you're a grandfather now
Fine young boy that we named after you
He is a good 8 pounds and six ounces
He can scream louder than an engine, too
I think he will grow to be a fine man
Strong of heart and soul he will be
He will wear the badge of the fireman
Like his old man, and my father before me

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Line breaks added. --JoeClone